llvm-svn: 49096

It allows Use-Def and Def-Use relations to be treated as graphs.

llvm-svn: 49088

when some another register is used for argument passing.
Currently is used on Win64.

llvm-svn: 49079

node and its inputs.

llvm-svn: 49070

unknown defining inst after PHI elimination.

llvm-svn: 49069

llvm-svn: 49065

review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.

llvm-svn: 49064

2. Do not use # of basic blocks as part of the cost computation since it doesn't really figure into function size.
3. More aggressively inline function with vector code.

llvm-svn: 49061

llvm-svn: 49060

ReMat of load from stub in pic mode extends the life of pic base. Currently spiller doesn't do a good job of estimating the impact. Disable for now.

llvm-svn: 49059

Iterators folloring a SmallVector erased element are invalidated so
don't access cached iterators from after the erased element.

llvm-svn: 49056

llvm-svn: 49055

llvm-svn: 49054

llvm-svn: 49053

llvm-svn: 49050

llvm-svn: 49048

llvm-svn: 49046

llvm-svn: 49045

llvm-svn: 49044

llvm-svn: 49043

start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.

llvm-svn: 49041

llvm-svn: 49040

llvm-svn: 49037

llvm-svn: 49036

llvm-svn: 49035

provides fast MappedFile::getFile for large files.

llvm-svn: 49034

1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.

llvm-svn: 49031

llvm-svn: 49030

MemoryBuffer is higher level and more closely matches the model
needed.

llvm-svn: 49029

llvm-svn: 49028

llvm-svn: 49027

llvm-svn: 49026

make getBase() return a const-correct pointer.

llvm-svn: 49025

not an mmapped file.  This more closely matches its requirements and
provides an implicitly null terminated buffer, something this
routine had to emulate itself before.

llvm-svn: 49024

llvm-svn: 49023

and shared.  This complicates the design, is not used, and probably
doesn't even work.

llvm-svn: 49022

llvm-svn: 49021

llvm-svn: 49020

llvm-svn: 49016

llvm-svn: 49014